Many people have difficulty reading newspapers and books because their eyes have experienced some changes due to natural aging. In this case, they may need special reading glasses that are particularly made for material reading. Another fact is that some people may still have myopia and need to wear regular prescription eyeglasses for distance vision. This sounds a dilemma that those people are forced to put on their reading glasses while reading and then switch to prescription glasses for distance activities such as watching TV.
Bifocal lenses are a wonderful invention, and it is said that they were invented in the 19th century by Benjamin Franklin himself. They help people with two separate vision problems and can greatly improve the comfort of someone who has vision problems because mostly these people are forced to carry two different pairs of glasses with them at all times. This is because with age you sometimes get two distinct disorder and you have problems seeing things that are far away from you, but also seeing a thing which is too near to your face, like newspapers, books or a television set. This can easily be helped by wearing glasses, but switching back and forth from one to another pair can be a bit frustrating, especially if it also means cleaning two pairs of glasses and caring for them (and not losing them, of course!)
Bifocal lenses in glasses can circumvent these problems by simply integrating two different lenses in one pair of glasses. This is done by integrating lenses with two different corrections in the same frame, thus creating a pair of glasses which, depending on where you look through the lens, provides you with different correction. Now, the easiest way to accomplish this is just to put one half of a lens on top of another, and this results in a tiny border that everybody can easily see and which has become the recognizable sign of someone wearing bifocals. But it doesn’t have to be so obvious. Modern lens designing allows for one lens to be put in the middle of the other in the form of a half-moon or circle where you can look through if you’re reading, or you can even wholly make the distinction between the two lenses disappear so that your lenses look like normal lenses for ordinary glasses. This allows for a more esthetic exterior and also for far more vision comfort because you won’t have to look for another different pair of glasses anymore. This way you have all your needed vision correction on your nose all the time without the need for another pair, and you can read and look at landscapes as often as you like without blur.
Bifocals are a good way to treat yourself to some more living quality if you haven’t yet had bifocal lenses, because it makes a difference if you’re able to see sharp and clear all the time. It’s a little bit like buying a new pair of glasses after your old ones weren’t strong enough for eyes anymore. Everything will seem sharper, and the world just seems different once you see it in more detail!